Update to use MySQL Database

internal/db/schema.go

@@ -2,54 +2,67 @@ package db
 
 const schema = `
 CREATE TABLE IF NOT EXISTS volunteers (
-    id          INTEGER PRIMARY KEY AUTOINCREMENT,
-    name        TEXT    NOT NULL,
-    email       TEXT    NOT NULL UNIQUE,
-    password    TEXT    NOT NULL,
-    role        TEXT    NOT NULL DEFAULT 'volunteer', -- 'admin' | 'volunteer'
-    active      INTEGER NOT NULL DEFAULT 1,
-    created_at  TEXT    NOT NULL DEFAULT (datetime('now')),
-    updated_at  TEXT    NOT NULL DEFAULT (datetime('now'))
-);
+    id          INT AUTO_INCREMENT PRIMARY KEY,
+    name        VARCHAR(255) NOT NULL,
+    email       VARCHAR(255) NOT NULL UNIQUE,
+    password    VARCHAR(255) NOT NULL,
+    role        VARCHAR(50) NOT NULL DEFAULT 'volunteer' COMMENT 'admin or volunteer',
+    active      TINYINT NOT NULL DEFAULT 1,
+    created_at  TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at  TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
 CREATE TABLE IF NOT EXISTS schedules (
-    id            INTEGER PRIMARY KEY AUTOINCREMENT,
-    volunteer_id  INTEGER NOT NULL REFERENCES volunteers(id),
-    title         TEXT    NOT NULL,
-    starts_at     TEXT    NOT NULL,
-    ends_at       TEXT    NOT NULL,
+    id            INT AUTO_INCREMENT PRIMARY KEY,
+    volunteer_id  INT NOT NULL,
+    title         VARCHAR(255) NOT NULL,
+    starts_at     DATETIME NOT NULL,
+    ends_at       DATETIME NOT NULL,
     notes         TEXT,
-    created_at    TEXT    NOT NULL DEFAULT (datetime('now')),
-    updated_at    TEXT    NOT NULL DEFAULT (datetime('now'))
-);
+    created_at    TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at    TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    FOREIGN KEY (volunteer_id) REFERENCES volunteers(id) ON DELETE CASCADE,
+    INDEX idx_volunteer_id (volunteer_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
 CREATE TABLE IF NOT EXISTS time_off_requests (
-    id            INTEGER PRIMARY KEY AUTOINCREMENT,
-    volunteer_id  INTEGER NOT NULL REFERENCES volunteers(id),
-    starts_at     TEXT    NOT NULL,
-    ends_at       TEXT    NOT NULL,
+    id            INT AUTO_INCREMENT PRIMARY KEY,
+    volunteer_id  INT NOT NULL,
+    starts_at     DATETIME NOT NULL,
+    ends_at       DATETIME NOT NULL,
     reason        TEXT,
-    status        TEXT    NOT NULL DEFAULT 'pending', -- 'pending' | 'approved' | 'rejected'
-    reviewed_by   INTEGER REFERENCES volunteers(id),
-    reviewed_at   TEXT,
-    created_at    TEXT    NOT NULL DEFAULT (datetime('now')),
-    updated_at    TEXT    NOT NULL DEFAULT (datetime('now'))
-);
+    status        VARCHAR(50) NOT NULL DEFAULT 'pending' COMMENT 'pending, approved, rejected',
+    reviewed_by   INT,
+    reviewed_at   DATETIME,
+    created_at    TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at    TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+    FOREIGN KEY (volunteer_id) REFERENCES volunteers(id) ON DELETE CASCADE,
+    FOREIGN KEY (reviewed_by) REFERENCES volunteers(id) ON DELETE SET NULL,
+    INDEX idx_volunteer_id (volunteer_id),
+    INDEX idx_status (status)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
 CREATE TABLE IF NOT EXISTS checkins (
-    id            INTEGER PRIMARY KEY AUTOINCREMENT,
-    volunteer_id  INTEGER NOT NULL REFERENCES volunteers(id),
-    schedule_id   INTEGER REFERENCES schedules(id),
-    checked_in_at TEXT    NOT NULL DEFAULT (datetime('now')),
-    checked_out_at TEXT,
-    notes         TEXT
-);
+    id            INT AUTO_INCREMENT PRIMARY KEY,
+    volunteer_id  INT NOT NULL,
+    schedule_id   INT,
+    checked_in_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    checked_out_at TIMESTAMP NULL,
+    notes         TEXT,
+    FOREIGN KEY (volunteer_id) REFERENCES volunteers(id) ON DELETE CASCADE,
+    FOREIGN KEY (schedule_id) REFERENCES schedules(id) ON DELETE SET NULL,
+    INDEX idx_volunteer_id (volunteer_id),
+    INDEX idx_schedule_id (schedule_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 
 CREATE TABLE IF NOT EXISTS notifications (
-    id            INTEGER PRIMARY KEY AUTOINCREMENT,
-    volunteer_id  INTEGER NOT NULL REFERENCES volunteers(id),
-    message       TEXT    NOT NULL,
-    read          INTEGER NOT NULL DEFAULT 0,
-    created_at    TEXT    NOT NULL DEFAULT (datetime('now'))
-);
+    id            INT AUTO_INCREMENT PRIMARY KEY,
+    volunteer_id  INT NOT NULL,
+    message       TEXT NOT NULL,
+    read          TINYINT NOT NULL DEFAULT 0,
+    created_at    TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (volunteer_id) REFERENCES volunteers(id) ON DELETE CASCADE,
+    INDEX idx_volunteer_id (volunteer_id),
+    INDEX idx_read (read)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
 `